Piston-rod packing.



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. WITNESS/55 v UNITED s STATES PATENT OFFICE.

MORRIS E. BRIGGS, OF ALAMEDA, CALIFORNIA, ASSIGNOR OF TWO-THIRDS TO WILLIAM FULTON, OF SAN LEANDRO, AND IIOYLAND K. MOUL- TI-IROP, OF SAN FRANCISCO, CALIFORNIA.

PlSTON-ROD PACKING.

SPECIFICATION forming part 0f Letters Patent N0.'646,797, dated April 3, 1900.

Application filed January 13, 1900. Serial No. 1,384. (No model.)

To aZZ whom it may concern:

Be it known that I, MORRIS E. BRIGes, a citizen of the United States, residing at Alameda, in the county of Alameda and State of California, have invented certain new and useful Improvements in Piston-Rod Packing, of which the following is a specification;

My invention relatesto an improved piston-rod packing, the object'of my invention being to provide a Vpacking which shall be self-lubricating.

My invention, therefore, 'resides in the novel construction, combination, and arrangement of parts for the above ends hereinafter fully specified, and particularly pointed out in the claim.

In the accompanying drawings, Figure l is a section of a stuffing-box of apiston-rod with the packing in positionythe'rein. Fig. 2 is a horizontal section on the line d a. of Fig. 1, and Fig. 3 is a perspective view of the end of a piece of the packing.

Referring to the drawings, 1 represents the cylinder-head, 2 the piston-rod, and 3 the stuffing-box. 4 is the gland,l secured bybolts 5. 6 represents rings of my improved packing in position in said stufling-box, one over the other. Each ring comprises two annular wedges-an inner wedge 7 'and an outer wedge 3. The surface -ofvcleavage 9 does not follow the diagonal of the oblong, but, as shown'in Fig. l, cuts both the outerrcylindrical surface 10 and the inner cylindrical surface l1 ofthe packing-ring. It cuts the inner surface of the ring slightly above the lower inner edge of said ring, as shown at l2, and it cuts the outer surface of the ring a somewhat-greater distance below the upper outer edge of said ring, as shown at 13. The advantage of this construct-ion is that the packing-rings may now be set close together, one above the other,

superior arrangement of the lubricating material. In the oblique face 9 of the inner wedge is formed an annular groove 14, and in said groove is contained a ring 15 of lubricating material composed of strands of hemp or other fibrous material -saturated with alubricant that will not easily liquefy by heat, so that its action will be very gradual. The' advantage of this construction is that said lubricant inaddition to lubricating the pisL ton-rod now permits the coengaging surfaces of the wedges to. slide easily upon each other when the packing is adjusted for wear, and thus when such adjustment is made the pres# sure of the gland on all the packing-rings is substantially vuniform and vall of said rings are compressed' to substantially the same extent. v

In order to permit the packing to be readily inserted in the stuiiing-box, the upper outer edge of the inner wedge is rounded, as shown at 16.y

I claimm A ring packing for piston-rods comprising two wedgeshaving abutting oblique faces and lubricating material contained in a recess in oneof said faces, substantially as described.

In witness whereof I have hereunto set my hand in the presence of two subscribing witnesses.

M. E. BRIGGS.-

Witnesses:

- FRANCIS M. WRIGHT,

I-I. K. MoULTHnoP. 

